FormatStack
Free developer utilities that run entirely in your browser
1 ratings4.08
Saves1
CategoryDeveloper Tools
PlatformWeb
PricingFree
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FormatStack offers a suite of free developer tools including JSON formatter, JSONPath tester, regex tester, UUID generator, Base64 encoder/decoder, and cron parser. These tools run 100% client-side in the browser with no signup and no data uploaded to any server. Additionally, FormatStack provides comprehensive reference guides to help understand common developer tasks and errors.
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Information
CategoryDeveloper Tools
PlatformsWeb
PricingFree
AccountNot confirmed
ListedOctober 2026
WebVisit
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Mobile PageSpeed
Automated checks of the public website by Google Lighthouse 13.5.0. Scores can vary between runs.
Checked Oct 18, 2026
Test this website on PageSpeedWebsite checks refresh automatically each week.
- Performance
- 66 out of 100, Needs improvement
- Accessibility
- 95 out of 100, Good
- Best Practices
- 100 out of 100, Good
- SEO
- 100 out of 100, Good
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